DNS issues when setting up ISPConfig 3 for Intranet use

I've got a dilemma on my hands. I want to set up ISPConfig on our company network so that I can host a number of websites. I've set up ISPConfig as per the instructions on this site however I'm having some problems accessing the sites that I have created.

The server name is called intranet.mydomain.lan. The network already has a domain controller and DNS server (both on a Windows 2003 box). When I try to access intranet.mydomain.lan I get a page not found error. When I add the IP address of intranet to my LAN DNS server I receive the generic Apache index.html.

I've added the IP address of my ISPConfig server to the nameservers entry on the windows DNS server but still nothing.

Can anyone tell me how to get ISPConfig to play nice in a Windows domain?

For ispconfig it makes no difference if the server is in a intranet or not. Make sure that you created DNS A-Records in your dns server for every domain that you want to use as website in ispconfig. Then create the websites and select the internal IP addresses were the dns A-Records point to in the ispconfig website settings for this site.

I understand Till however when I create the site intranet.mydomain.lan in ISPConfig and then add the A Record on the Windows DNS server to point intranet.mydomain.com to IP address 192.168.1.116 only the default apache index.html is displayed. It is as if the domain is resolved before it hits ISPConfig and as a result it only serves the default index.html.

After making the changes I did a ipconfig /flushdns on my PC but that didn't make any difference.

Hi
I have a question about intranet and ispconfig.
Can I have a domain called sampleserver.com and a subdomain, let's say, mydomain.sampleserver.com on the internet, and then have multiple subdomains only on the intranet?
The point is to insert data in the intranet and some of that data be available in the internet, but both work on the same database.
Thank you.